What are the differences between async hooks and promises in JavaScript?

What are the differences between async hooks and promises in JavaScript?

Async hooks and promises are both used for handling asynchronous operations in JavaScript, but they serve different purposes. Promises are a way to handle the result of an asynchronous operation, while async hooks provide a mechanism to track the lifecycle of asynchronous resources.

Can you explain how async hooks work?

Sure! Async hooks allow you to create a context for asynchronous operations, enabling you to track their execution and manage state across different asynchronous calls. This is particularly useful for debugging and monitoring.

When should I use async hooks instead of promises?

You should use async hooks when you need to maintain context across asynchronous calls, such as in logging or performance monitoring. Promises are more suitable for handling the results of asynchronous operations.

Are there any performance implications of using async hooks?

Yes, async hooks can introduce some overhead due to the additional tracking they perform. It's important to weigh the benefits of context management against the potential performance costs.